.header{
    width: 90%;
    height: 30px;
    background-color: gainsboro;
    margin: 0px auto;
    display: flex;
    justify-content: space-between;
}
.header>ul{
    display: flex;
    justify-content: center;
    align-items: center;
}
.header>ul>li{
    margin: 0px 5px;
}
.header a:nth-of-type(2){
    color: white;
    margin-left: 5px;
}
.header > ul > li.active {
    display: none;
  }
.header li:hover{
    color: orange;
}
.header a:hover{
    color: orange;
}

.content {
    margin: 20px auto;
  }
  
  .content > div {
    display: none;
  }
  
  .content > div.active {
    display: block;
  }
  
  .content > .cart > .top,
  .content > .cart > .bottom {
    height: 50px;
    background-color: orange;
    display: flex;
    align-items: center;
    box-sizing: border-box;
    padding-left: 30px;
  }
  
  .content > .cart > .top > input {
    margin-left: 20px;
    width: 20px;
    height: 20px;
  }
  
  .content > .cart > .bottom {
    display: flex;
    align-items: center;
    box-sizing: border-box;
    justify-content: space-between;
    padding: 0 20px;
  }
  
  .content > .cart > .bottom > .btns > button {
    padding: 0 10px;
    border: none;
    background-color: red;
    color: #fff;
  }
  
  .content > .cart > .bottom > .btns > button.delAll {
    background-color: orange;
  }
  
  .content > .cart > .bottom > .btns > button.pay {
    background-color: skyblue;
  }
  
  .content > .cart > .bottom > .btns > button.disable {
    background-color: #ccc;
    cursor: not-allowed;
  }
  
  .content > .cart > .cart_list {
    padding: 10px;
    padding-bottom: 0;
  }
  
  .content > .cart > .cart_list > li {
    width: 100%;
    height: 100px;
    border: 1px solid #333;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
  }
  
  .content > .cart > .cart_list > li > .show,
  .content > .cart > .cart_list > li > .delete,
  .content > .cart > .cart_list > li > .select {
    width: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .content > .cart > .cart_list > li > .title {
    width: 400px;
    box-sizing: border-box;
    padding: 3px;
  }
  
  .content > .cart > .cart_list > li > .price,
  .content > .cart > .cart_list > li > .subPrice {
    width: 150px;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: red;
    font-size: 22px;
  }
  
  .content > .cart > .cart_list > li > .number {
    width: 200px;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .content > .cart > .cart_list > li > .number > button {
    width: 30px;
    height: 30px;
  }
  
  .content > .cart > .cart_list > li > .number > input {
    width: 50px;
    text-align: center;
    height: 28px;
  }
  